package com.itouch.bracelet.bean;

/**
 * @author shenjun E-mail:shenjun@itouch.com.cn
 * @version ����ʱ�䣺2014-8-5 ����11:03:23 ��˵��
 */
public class UnicodeUtil {

	public static String unescape(String src) {
		StringBuffer tmp = new StringBuffer();
		tmp.ensureCapacity(src.length());
		int lastPos = 0, pos = 0;
		char ch;
		while (lastPos < src.length()) {
			pos = src.indexOf("%", lastPos);
			if (pos == lastPos) {
				if (pos == src.length() - 1)
					break;
				if (src.charAt(pos + 1) == 'u') {
					ch = (char) Integer.parseInt(
							src.substring(pos + 2, pos + 6), 16);
					tmp.append(ch);
					lastPos = pos + 6;
				} else {

					if (src.substring(pos + 1, pos + 3).equals("%u")) {
						unescape(src.substring(pos + 1));
						break;
					}
					ch = (char) Integer.parseInt(
							src.substring(pos + 1, pos + 3), 16);
					tmp.append(ch);
					lastPos = pos + 3;
				}
			} else {
				if (pos == -1) {
					tmp.append(src.substring(lastPos));
					lastPos = src.length();
				} else {
					tmp.append(src.substring(lastPos, pos));
					lastPos = pos;
				}
			}
		}
		return tmp.toString();
	}

}
